Preventive medicines are used to avoid severe or chronic headaches, such as migraines or cluster headaches. They are not usually used to treat headaches after they begin.
Preventive medicines relax blood vessels. Experts are not sure what causes migraines.
Examples of preventive medicines are beta-blockers, calcium channel blockers, antidepressants, and anticonvulsants.
In order for these medicines to work, you will need to take them daily even when you do not have a headache. You may have to take them daily for only a few months.
Credits
| Author | Monica Rhodes |
| Editor | Kathleen M. Ariss, MS |
| Associate Editor | Pat Truman, MATC |
| Primary Medical Reviewer | Anne C. Poinier, MD - Internal Medicine |
| Specialist Medical Reviewer | Colin Chalk, MD, CM, FRCPC - Neurology |
| Last Updated | July 3, 2007 |
Author:Monica Rhodes
Last Updated: 07/03/2007
